select features
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From: blue ice on 27 Jul 2010 09:58 i have extracted features from an image i-e SIFT features from this link http://www.cs.ubc.ca/~lowe/keypoints/ now i have features in a matrix. now i want to Firstly Select top most feature (at thr right side of image) and bottom most feature (at the right side of image). than draw a line between these two features. can you tell me how to do this.
From: us on 27 Jul 2010 10:00 On Jul 27, 3:58 pm, "blue ice" <chase_the_dawn_2...(a)yahoo.com> wrote: > i have extracted features from an image i-e SIFT features from this linkhttp://www.cs.ubc.ca/~lowe/keypoints/ > > now i have features in a matrix. > now i want to Firstly Select top most feature (at thr right side of image) and bottom most feature (at the right side of image). > than draw a line between these two features. > > can you tell me how to do this. why do you simply repeat your OP(?)... can you not reflect on what other(s) have told you, already(?)... us
From: us on 27 Jul 2010 10:03 "blue ice" <chase_the_dawn_2000(a)yahoo.com> wrote in message <i2molc$ke0$1(a)fred.mathworks.com>... > i have extracted features from an image i-e SIFT features from this link http://www.cs.ubc.ca/~lowe/keypoints/ > > now i have features in a matrix. > now i want to Firstly Select top most feature (at thr right side of image) and bottom most feature (at the right side of image). > than draw a line between these two features. > > can you tell me how to do this. do NOT double post... us
From: Andy on 27 Jul 2010 10:03 "blue ice" <chase_the_dawn_2000(a)yahoo.com> wrote in message <i2molc$ke0$1(a)fred.mathworks.com>... > i have extracted features from an image i-e SIFT features from this link http://www.cs.ubc.ca/~lowe/keypoints/ > > now i have features in a matrix. > now i want to Firstly Select top most feature (at thr right side of image) and bottom most feature (at the right side of image). > than draw a line between these two features. > > can you tell me how to do this. Don't multiple post. Did you bother to read the reply in your other thread?
From: blue ice on 27 Jul 2010 10:07
"us " <us(a)neurol.unizh.ch> wrote in message <i2mn8s$hrf$1(a)fred.mathworks.com>... > "blue ice" <chase_the_dawn_2000(a)yahoo.com> wrote in message <i2mmjp$4bd$1(a)fred.mathworks.com>... > > i have extracted features from an image i-e SIFT features from this link http://www.cs.ubc.ca/~lowe/keypoints/ > > > > now i have features in a matrix. > > now i want to Firstly Select top most feature (at thr right side of image) and bottom most feature (at the right side of image). > > than draw a line between these two features. > > > > can you tell me how to do this. > > this is too vague(!)... > you need to provide more information in ML language, eg, > - small sample of your input... > - an idea of how your output should look like... > - maybe(!) even a snippet of ML code... > > us i am using this [image1, descriptors1, locs1] = sift(image1); so i have this data image1: the image array in double format descriptors1: a K-by-128 matrix, where each row gives an invariant descriptor for one of the K keypoints. The descriptor is a vector of 128 values normalized to unit length. locs1: K-by-4 matrix, in which each row has the 4 values for keypoint location (row,column, scale, orientation). The orientation is in the range [-PI, PI] radians. i want to get two descriptors,one located at top of image and other at the bottom of the image (but at right side). than draw a line between these two. hope u get my point :( |